Reamer



April 21, 192s Re. 16,051

v J. S. BROWN REAMER 5 Sheets-Sheet l Original Filed Nov. 4, 3.91?

April Z1, 1925.

J. S. BROWN REAMER Original Filed Nov. 4l ;91 9 3 SheetslSheet 2 R.16,051 J. S. BROWN REAMER Original Filed Nov. 4. 1919 l3 Sheets-SheetReissued Apr. 21, 1925.

UNITED STATES PATENT OFFICE.

JACOB S. BROWN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF N'HALF T0 WALTERF. EICHENHOFER, OF LOS ANGELES, CALIFORNI REAMER.

. Original No. 1,390,876, dated September 13, 1921, Serial No. 335,739,filed November 4, 1919. Application l for reissue filed August 11, 1923.Serial No. 656,905. u

'0 all whom z't'mag/ cormern Be it known that I, .lecon S. .BROWN acitizen of the United States, residing at Los Angeles, in the county ofLos Angeles and State of California, have invented new and usefulImprovements in Beamers, of whichl .the following is a specification.

This invention has reference to well drilling apparatus.

` The object of the invention is to produce a combined` bit andvreali-ier having means whereby lthe reamer jaws will be pocketed in thestock of the bit, as the bit passes through the casing, and whereby thereainer jaws will be expanded, and locked in operative position afterpassing through the end of the casing.

A further object of the invention is to produce a drill for oil wells'orthe like hav ing reamer jaws `associated therewith andnormally-pocketedtherein, means being provided for locking the jaws inthcgr pockets, means being also provided for expanding or swinging thejaws angularly with respect. to the bit stock when the same are broughtto operative position. and means being also providedtor permitting thejaws to be again received in their pockets when the bit is Vto beyremoved l'roin the well casing.

Alt is astill further object of the. invention vto provide a' hit forwell. drilling devices having reainers associated therewith andAconnected"thereto insuc-h a .manner as to beA .effectively housed orpoelieted in noinopera tive position and firmly sustained in operativeyposition, means actuated by contact with the v'Well casing beingprovided for auto- -matically housing ,the reamers when the bit `iswithdrawn from the casing.'

Other objects and advantages Will present themselves as the nature ofthe invention is better understood, reference being had to theaccompanying drawings, in which v Figure 1 is an elevation ot theimprovement.

.Figure 2 .is a similar View, parts being broken away, and taken at aright angle to thc showing in Fig. '1.

ythe numerals 20.

Fig. 3 is an approximately central longitudinal sectional Viewtherethrough.

Fig. 4 is a similar view but taken at right angles to Fig. 3.

ig. 5 is a sectional. view illustrating the manner in which the reamerjaws are brought to non-operating position when the blt is to bewithdrawn from lthe Well casing.

6 is a vtranverse sectional view approximately on the line 6`6 of Fig.3. i

Fig. 7 is a perspective View of the spring infiuenced jaw mandrel.

Fig. is aperspective view ofone of the reamer jaws.

The bit stock is indicated by the numeral, 10, and comprises a'm'einberwhich is round 1n cross section. The stock, at the lower end thereof isintegrally formed with the bit '11. The ybit is provided byv preferablyyuf'idening the end of the stock, beveling the same inwardly touf'ardthecenter thereof as at 12 d reducing the sides of the stock for the lengthot' the bit, and further centrally depressing or channeling the reducedsides as indicated by the characters 1.3. The. stock, above lthe bit 1lisprovided, for a deter` mined length, with an opening 14, that passesthrough the stock from the sides thereof on which the sides ot the bitare torn'led. The stock 1() is rounded lo the flat edges 16 on the widesides of the bit., and the walls ofthe opening, at the said rounded'portion of the stock are cut to provide pockets 17, and the upper'wallsof these pockets are notched as at 19. The sides of the bit, at the endthereof adjacent the opening let are beveled inwardly toward the saidopening as indicated by The upper wall of the opening has a rectangularpassage 21 in thel center thereof which communicates with a round borethat extends from the outer o1'- upper end of the stock. Arranged in atransverse socket 27 inthe stock. at the rectangular assage 21 thereinis a key 23. The key lies its outerend formed with a head 24.-, and theupper corner of the saidhead is rounded as at 25. This head is designedto be received in a notch 26 on one side of the stock and which notch,of course, communicates with the socket 27. The key is inuenced by aspring 28 that is received in the inner portion of the socket 27 so thatthe head of the key is normally forced outwardly of the stock. The keyis provided witha notch 29 on one of the sides thereof, the said notchbeing of a length approximately equaling or slightly greater than thewidth of the passage 21 and the spring 2S influences4 the key so thatthe inner shoulder 30 provided by the notch in the said key is receivedin and partly closes the rectangular passage 21.

The mandrel for the reamers comprises rod member 31 having its outer endthreaded and its inner cud provided with asubstantially rectangular headportion 32. This head is of asize to be snugly received in therect-angular passage 21, the rod being received in and projectingoutward of the bore 22. The head 32 has one of its edges notched as at33 and below t-he notch is provided on both ogits sides with transversegrooves 34. AboveJ the notch the head is provided with a round opening35. The head 32 ot' the mandrel passes through the notch 29 in the key23, and when the notch on the said head of the mandrel is broughtopposite the socket 27 the spring influenced key will bring the shoulder3() into the notch 33, thus locking the mandrel in one position withrespect to the stock and with respect to the opening 14 in the stock.The stock is provided with an opening 36 designed, when the mandrel isbrought to a second position to register withy the opening 35 in thehead thereof, and; adapted to pass through these registerihg openings isa 3T which locks the mandrel in one position and which holds the reamersagainst opening or being brought to operative positions The pin is onlyapplied, when the stock is conveycdfrom place to place or is not de-.sii-ed lor immediate use. v

b-urrouiulingthe stem 31 of the mandrel is a helical spring 38. Thelower end of this spring finds a bearing on the shoulder provided by theinner wall of the bore 22,

1 and its outer tend in contacted by a washer a3i) which is adjustablyengaged by a nut 40 which is screwed on the outer and threaded end ofthe stem 31.

. `The outer end of the stock isprovided with a conical boss 41 throughwhich the round opening in the said stock passes. This boss is providedwith exterior threads which are designed to co-engage with interiorthreads inA a` truste-conical opening in the lower end of the cap 42.for the stock 10. The cap 42, :above its conical opening is providedwith a b`ore 48 receiving therein the end of the rod 31, and the saidcap has upon its upper and outer cud the usual concshaped lthreadedextension 44 toreceive the socket end of operating rod. p l

The reamer comprises two similarly constructed reamels 45 each having asubstantially rectangular shank 46 and a widened toot-hed portion 47extending from the shank. rIlhe shank of each of the jaws is providedwith a reduced extension in the.

nature of a right angular flange 48, and each of these flanges isprovided with a pair of spaced angle slots 49 and 5() respectively.

The flanges of the respective jaws are designed lfor lapping engagementwhen the respective reamers are arranged in the opening 14 of the stock.lVhen so arranged the angle openings of the respective flanges aline.`Ledges 51 areformed at the outer ends of slots 52'4in each of theflanges at the upper edgesthereof. These ledges are received in thegrooves 34 on the head 32. Bolt members 53 and 54 respectively arepassed through alining openings in the sides of the stock 10 and throughthe angle openings in the flanges The heads of the bolts are kerfed andare received in depressions 55 in the sides ofthe stock. Nuts 57 engagethe bolts 53 and 54 and are received in depressions or pockets 58 on theopposite sides of the stockl 10 and these nuts may be castellated orhave their opposite edges provided with kerfs 59.

The toothedportion 47 of each reamer 45 has its inner face extendedbeyond its shank and the inner corners of said extensions provided withlugs 60 that are designed to be received in the notches 19 when thereamers are in operative posrtion. The inner face of each of thev saidtothed portions, inward of one of the lugs, and outward of the flange ofthe shank is formed with a tongue 61, the 'under face of the said tonguebeing beveled as at 62. These tongues are designed to ride over thebeveled surfaces 20 at the upper edge of the bit 11 and to rest upon thesaid upper edge Awhen the rcamers are iu inoperative position. Also eachof the tongues underlies and rests on the bottoni ot' the flange of theadjacent or (5o-operating reamer as well as contacts with one of thewalls of the opening 14, when the reamers are in operative position,whereby to more effectively support and sustain the said reamers in suchoperative position. In addition to this, the shoulders provided betweenthe Shanks and the toothed portions yof the reamers rest against theupperl walls of the pockets 17 when the reamers are in operativeposition, while the Shanks and flanges cont-act with the straight sidewalls of the opening 14 to'additionally support the reamers firmlyinoperative position.

lVhen the device is inserted in a. well cas- .ing 463, the key 25 ismoved inwardly through the passage 21 against the pressure of its spring28 to bring the shoulder 30 out lull of the notch 33 in the head 32 ofthe inandrel. A pressure is exerted in the outer end ot' the` stem 51 tomove the mandrel in wardl \v through the stock to cause the inandrelthrough the engagement of the walls provided by the grooves 8l thereinwith the ledges 5l on the flanges ot' the reamers to force the reamersinwardly of the stock incident to the arrangement of `the bolts 53 and5l in the angle slots 45 and 50 on the flanges of the said reaniers. Thebitis forced downward through the casing, and after the upper ends ofthe shanks of the said reaniers pass the lower edge of the casing, thespring 28 will force the key 23 outwardly through the passage l :27, thespring BS in the meantime having moved the mandrel upwardly ot' thestock7 so that the shoulder 30 provided in the slot 29 ol the key willbe received in the notch 33 of the mandrel 32. rlhis upward movement ofthe. mandrel influences the reainers to their outward and operativeposition, the bolts 53 and 5st being now arranged in contactingengagement with the lower walls provided by the vertical passages in theangle slots 49 and 50. When 'an upward pull is exerted upon the Ystockthetrounded corner 25 of the key will be contacted by the lower edge ofthe casing, again forcing the same inwardly of its passage andtheshoulder thereof out ol the notch in the head 32 of the inandrel. Afurther upward pull of the stock through the casing will bring the upperand rounded corners 46 against the lower end of the casing, moving thesaid reaniers downwardly and causing the saine to be moved inwardly totheir initial position against the tension of the spring 38 of themandrel after the interengagiug elements between the reainers and thestock have been brought out ol such engagement.

From the foregoing Adescription taken in conjunction with theaccompanying draw ings` it will be manilest ythat I have provided areamer tor wells in which the stock and blades or cutters areconstructed so that the cutters are etl'ectively supported in operativeposition to withstand the percussions, stresses, and circumferentialstrains to which they are subjected during operation ol the reainer.Further, the stock and cutter construction reduces toa minimum thepossibility of the cutters being broken and `lost in a well.

After having described and ascertained ,the nature ol my invention, whatl claim as new iS:

l. A drill 'well` casing including a, stock, having an integrally formedbit at the lower end thereot and having a transverse opening above thebit, reamers having upper rounded corners and having lapping flangeswhich are received in said opening, means between the gne'. to be.passed through a flanges and the Stochr for permitting a limitedlongitudinal and lateral movement otl the reamers through the opening.spring means for influencing the reamers to an outward and angularposition with respect to `the stock, interengaging means between the thelower end ot' `the casing when the stockl is moved upwardly toward thecasing whereby to release the latcliing means and to exert a `downwardpressure upon the rounded corners of the reamers to move the latteragainst the influence of the spring means to bring the interengagingmeans therebetween out of such engagement and the contacting elementsout ot contact with the stock and to again seat the reaiiiers in theopening in the stock.

2. A drill designed to be passed through a well casing, including astock having an integral bit at the lower end thereof and having atransverse slot above the bit, oppositely arranged reainers havingflanges received in the opening, said tlaiiges having oppositelyarranged alining angle slots therethrough, bolt members passing throughthe stock and received in said slots, said flanges having ledges attheir upper edges, a mandrel having a slotted portion receiving theledges, said mandrel also having a `notched edge, and a projecting stem,spring means between the stem and stock tor intluencing the mandrel inan upward direction through the stock, a laterally movable spring'influenced latch having an `outer rounded head designed to engagemandrel when the latter spring to move the through the opening in isinfluenced b v its reaiiiers upwardly the stock. and to in the notch ottheV ltlt) lli) cause the angle walls ol the slot therein to beinfluenced by the bolts and project said reaiiieis at an out fard anglewith respect to the stock, tongues on the respective reamers lengagingthe stock when .the reamers are in such position and said latch andreainers designed for engagement with the wall of the bore of the casingwhen the drill is passed through the casingy torliringiug l r l Athelatch to unlatching position and toil iiililuencing the eamers to aninward and inoperative position in the opening in the stock. i A c 3. Adrill and reamer designed to he passed through a well casing, comprisinga stock having' a bit at the lower end thcreo't' and having atransverse. opening above the bit, reamers disposed in said openings,cach l operative position, said locking means normally projectinglaterally from said stock and, on engaging the wall casing, releasingthe saidniandrel to permit movement ol said ream'ers into inoperativeposition.

4. 'A drill and reainer designed to he" passed through a well casing,comprisingV a stock having a bit at the lower end thereo't' and having atransverse opening above the bit, reamers disposed in said openings,each reainer having a pair of angle slots, pins passing through saidslots and secured to said stock, said angle slots being formed so lthatwhen the pins occupy the upper end of said slots theneamers are ininoperative position, ,and'wlien the pins occupy the lower end of saidslots `the reaniers are in operative posit-ion, means urging to movesaid reamers into operativeiposition, means `for locking lsaid icamersin operative position, said locking means normally projecting beyond thebody of said stock and adapted on engaging the inner Wall of the wellcasing, to release said reaniers and permit n'iovement thereof intoinoperative position. 5. A reamer designed to be passed through la Wellcasing, comprising a stockhaving a. transverse opening, a pair ofreainers disposed in said opening, said reamers having overlappingflanges and each reamer being provided with a pair of angle slots', pinspassing through said slots and secured to Isaid Stock, said anglc'slotsbeing formed so l-hat when the pins occupy the upper end .ol' said slotsthe reamers are iii'inoperativd position, and when the pins occupy-thelower end of said slots the reamers are in operative position, avertically movable mandrel operatively connected to said reamers, aspring urging to move said mandrel upwardly and said reaniers intooperative position, and means locking said mandrel against movement andadapted, on engaging the inner walls of the well casing, to release saidmandrel, permitting said reamers to move into inoperative position.

6. A drill and lreainer designed to be passed through a well casingcomprising a stock having a bit at the lower end thereot and having atransverse opening above the "bit, a pair of reamers disposed in saidopening, each ieamer having a shank. a flange extending :from the shankand overlapping the flange of the other reamer, a tooth portiondepending 'from the shank, a tapered tongue on said `tooth portion, theupper' end oi' said bit being beveled for engagement and support of saidtongue, and means urging said4 reamers into operative position,lockingmeans holding said first named means against movement when saidreainers are in operative position, but releasing said iirst named meansonfengaging the well casing and permitting said first named means tomove said reainers into inoperative position. i

7. A drill and reamer designed to be' passed through a well casing,comprising a stock having a bit at the lower end thereof,

a pair of reamers movable in the stock tooccupy operating andinoperative positions, means for inovingtlie reamers to operatingposition including a mandrel normally urged upwardly, means includingAa, spring` controlled key for locking the mandrel in' a position inwhich the reamers are in operative position, said reamers being providedwith slots and pinsV passing through said slots and secured to thestock, each of said' pins passing through both of saidvreain'ers andlimiting the outwardand inward moveinent of the reamersl 8. A reamer,comprising a stock, reamer cutters movable in the stock and havingledges thereon, a 4mandrel movable in the stock and including a headformed with' grooves. for'reeeiving the ledges, thereby providing anoperative connection between the cutters and the mandrel, meansco-acting with said cutters to limit the movement of the cutters intooperative and inoperative tions, said mandrel including a notched headmovable across said socket, a spring urging said mandrel upwardly/a keymovable in said socket, having a notch therein to engage said head andlock the samefagainst movement, said key being-normally urged to aposition in which its notch locksY said head, a head formed on vthe keyadapted to lbe disposed Within the first notch, and a'pair ot underreamer cutters operatively connected to said mandrel.

10. An under reamer, comprising a stock having a passage therein, asocket intersecting the passage, a mandrel movable-'in said passage,cutters provided at their upper ends willi ledges, the mandrel beingpromiV lll0

lau

vided :it its lower end with a head formed with grooves for thereception of the ledges of said cutters, thereby forming an operativeconnection therewith, a notch in said head, a key disposed in saidsocket, and adapted to lock said head against move'- ment, said keyprojecting laterally from said steek and adaptedhwhen the said keyengages the well casing, to release the head.

of the mandrel, whereby the irland-rel is per- 10 mitted to move thecutters into inoperative position.

vIn testimony whereof I'have signed my name to this specification.

JACOB `s. BROWN.

